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Document Conversion Library for JavaScript

The ConvertAPI JavaScript library provides a streamlined way to integrate powerful document conversion and processing capabilities directly into your web applications. By handling hundreds of different file formats—from PDFs and spreadsheets to images and presentations—it allows you to convert and manipulate your documents with minimal overhead.

NPM package GitHub

Integrate within minutes

It is easy to start converting documents using JavaScript in a few simple steps:

1

Sign up for a free account

Sign up for free and receive 250 conversions to try and evaluate our service. You will receive a free trial with no credit card required upon registration!

2

Set up the conversion online

On your account dashboard you will access an intuitive UI tool that allows you to set up the conversion, adjust the parameters, and try the conversion online with zero code.

3

Copy auto-generated code snippet

Once you have set up the conversion parameters and are happy with the conversion results, you will receive an auto-generated JavaScript code snippet with your custom parameters!

Get started now

Document management toolkit for JavaScript

ConvertAPI JavaScript library provides an intuitive, promise-based interface that makes incorporating advanced features, such as file chaining and fine-grained parameter controls, feel natural and efficient. With clear documentation and ongoing updates, the ConvertAPI JavaScript library helps you deliver robust, flexible document workflows without the complexity of building everything from scratch.

File Converter Suite

High-performance and unbeatable accuracy document converter suite with support for over 500+ conversion.

Document Builder using JavaScript

Generate dynamic DOCX and PDF documents like invoices, contracts, reports, on the fly.

Document Management tools

Protect, redact, compare, watermark, flatten, compress and modify your documents using ConvertAPI JavaScript SDK.

Security and Decryption

Protect and unprotect PDFs, MS Office Powerpoint and MS Office Word documents.

AI Data Extractor

Built to scale with your business, whether you're handling a few conversions or thousands.

Archiving & Optimization

Reduce file sizes without losing quality. Archive converters are designed to handle over 100 different file formats.

Take a look at JavaScript code samples

View on GitHub

Configure it online - we will generate the JavaScript code for you!

Configure your file conversion directly online using our intuitive interface. Select the desired parameters and see the results in real-time. Once you're satisfied, we’ll automatically generate the JavaScript code for you, making integration into your project effortless. No need to start from scratch—just copy the code and implement it seamlessly into your JavaScript application!

Get started now

File conversion example using JavaScript

The ConvertAPI JS library offers a flexible, powerful solution for integrating document conversion, manipulation, and management directly into your JavaScript projects — it runs in the browser. Designed to accommodate a broad range of file types, it supports transforming PDFs, Office documents, images, and many other formats through a concise, promise-based interface that’s intuitive and easy to work with.

The library’s straightforward methods let you trigger complex transformations in just a few lines of code. You can retrieve files from URLs, read them from buffers, or interact with local files—offering the flexibility to seamlessly integrate conversions into existing pipelines or client-server architectures.

For projects that rely on older tooling or a non-module environment, you can still find and utilize the legacy version of the library. The ConvertAPI GitHub repository, located at https://github.com/ConvertAPI/convertapi-js/tree/last_nonmodule, contains previous releases and documentation for the older, non-module variant of the library.

Install the ConvertAPI JavaScript client into your project

To get started, install the ConvertAPI JavaScript SDK. Run this line from console:

npm i convertapi-js@~1.1

Convert PDF to JPG using JavaScript

The ConvertAPI JavaScript integration for PDF-to-JPG conversion makes it simple to generate high-quality image previews from PDF documents directly within your web applications. By transforming PDF pages into JPG images, you can enhance user experiences, enable quick visual references, and streamline workflows that depend on easily viewable content.

There are multiple use cases how you might benefit from PDF to JPG conversions in a browser:

  • Displaying PDF Thumbnails on a Website
  • Web-Based Image Galleries and Slideshows
  • Previews in Document Management Systems
  • Improved Performance and Compatibility

Let's see how easy it is to perform a PDF to JPG conversion in a browser:

// Code snippet is using the ConvertAPI JavaScript Client: https://github.com/ConvertAPI/convertapi-library-js

// Code snippet is using the ConvertAPI Node.js Client: https://github.com/ConvertAPI/convertapi-nodejs

// Code snippet is using the ConvertAPI PHP Client: https://github.com/ConvertAPI/convertapi-php

// Code snippet is using the ConvertAPI Java Client: https://github.com/ConvertAPI/convertapi-java

// Code snippet is using the ConvertAPI C# Client: https://github.com/ConvertAPI/convertapi-dotnet

# Code snippet is using the ConvertAPI Ruby Client: https://github.com/ConvertAPI/convertapi-ruby

# Code snippet is using the ConvertAPI Python Client: https://github.com/ConvertAPI/convertapi-python

// Code snippet is using the ConvertAPI Go Client: https://github.com/ConvertAPI/convertapi-go

REM Code snippet is using the command line utility program: https://github.com/ConvertAPI/convertapi-cli

<!-- For conversions with the multiple file result please refer to this example: https://repl.it/@ConvertAPI/HTML-Form-with-multiple-file-result -->

By using our JavaScript SDK, you gain access to over 500 document conversion and management features, all readily available in a single, unified platform.

The JavaScript library accommodates documents from URLs, file streams, or local file paths, making it easy to fit into your existing environment. To further streamline your processes, consider employing conversion workflows, allowing you to apply multiple, step-by-step transformations to the same document.

For comprehensive examples and expert insights, be sure to explore our GitHub repository.

Automate Your Document Management using JavaScript

Take control of your documents with our JavaScript document management SDK. From basic conversions to full workflow automation, we provide the expertise and tools you need to manage your documents efficiently.

Data security is our top priority

We ensure that all document processing is handled securely in the cloud, adhering to industry-leading standards like ISO 27001, GDPR, and HIPAA. To enhance security even further, we can ensure that no files or data are stored on our servers and never leave your country.

Learn more about security

Businesses trust us

Highest rated File Conversion API on major B2B software listing platforms: Capterra, G2, and Trustpilot.

"ConvertAPI has been a game-changer for our document automation workflows. Their conversion accuracy and API reliability are unmatched in the industry for over 7 years."

Oscar Brown Director of Development at Flocknote

"ConvertAPI is a reliable, cost-effective solution with a proven track record of stability. It has grown significantly in maturity, adopting enterprise-grade practices over the years."

Kenny Dickie Director of Engineering, Showbie

"We've integrated ConvertAPI across our entire document processing platform. The performance is exceptional and the support team is always responsive. Highly recommended!"

Dennis Mortensgaard CRM Engineer, DoWeb APS

Frequently asked questions

What can the ConvertAPI JavaScript SDK help me with?

It streamlines the process of converting, manipulating, and managing a wide range of documents—spanning PDFs, Office formats, images, and more—directly in web or Node.js environments. This enables you to enrich web interfaces, automate backend tasks, and easily handle complex workflows without juggling multiple external tools.

How complicated is it to get started?

It’s quite straightforward. After installing the package, you simply import it and set your credentials. From there, a few lines of JavaScript can initiate conversions and other operations. Comprehensive documentation and code samples ensure you can start producing results quickly, even if you’re new to these tasks.

Can I adjust parameters for each conversion?

Absolutely. The SDK allows you to fine-tune details like image quality, page ranges, output formatting, and compression settings. This level of customization helps you produce precisely the results you need for different use cases, whether that’s creating high-resolution images or compressing files for efficient storage.

How does the SDK handle large files or numerous conversions?

By leveraging asynchronous programming patterns and efficient data streaming, the SDK can manage extensive workloads without bogging down your application. You can also scale by running multiple conversion processes in parallel or by chaining operations to build custom workflows.

What about security and privacy concerns?

The SDK is designed to support secure data handling. You have options like processing files in memory, limiting storage duration, and integrating easily with encrypted data flows. Compliance with industry standards and privacy regulations is a key focus, ensuring your documents remain confidential.

Where can I find more guidance or advanced tips?

In addition to the official documentation, our GitHub repository hosts a collection of in-depth examples, sample projects, and best practices. Exploring these resources can provide new insights, shortcuts, and strategies for making the most of the ConvertAPI JavaScript SDK in your specific environment.

Try our JavaScript library for free!